Yes, RevTwt is a Twitter Advertising Network on the interwebs, provides this opportunity to earn.

Post Ads: $0.05 - $0.25  per  click
Shortened URL: $0.05 - $0.10  per click

1. Make a PayPal account if you still don't have one. I advise you to create an email address intended for that PayPal account only.

2. You should have a twitter account. If none, go here: Twitter.com

3. Click here to sign up for your RevTwt account!

Steps:

1. When the revtwt homepage opens, click on the "Earn Money" box. Fill in the necessary information.

2. When you are logged on, click on the "Twitter Accts" tab on the upper right of the page.

3. You should add a new twitter account. Enter your twitter username and password on the box provided.

4. Click on "Add" button. You can add up to 10 Twitter accounts.

Note: You should do this before logging out. If not, your RevTwt account will be automatically deleted without a twitter account added.

How to Start Earning Money

1. After doing the above steps, you can now start. Make sure you are logged-on on Twitter.

2. If you have 50 or more followers on Twitter, you can click on the "Post Ads" tab on the upper left of the page. You can choose which adds you want to post on your Twitter.

3. If you are new to Twitter and have a few followers yet, then click on "Short URL" tab above the page. Paste a URL that you want to shorten and to be posted in your twitter profile on the box and click "shorten it" button.

The new URL will appear below and click on the "tweet it" button. It will be pasted on your new tweet box ("What are you doing?") on Twitter. Write a title for the tweet. Click "update" button. Finish!

4. Repeat the same process if you want to post more. You can also paste the shortened URL to websites or to your blog. When people click on it, ads are shown in a transition page. When people click on an ad, you get paid if the click is valid (in target country, not click fraud)

5. Continue earning in Facebook?
         If you have more than 20 friends on your facebook, you can place an ad a day. If someone from the ad's target country clicked the ads, u get paid.
    Now, click on "Facebook" tab on your revTwt account. Paid ads will show up and you can choose what you want to be posted in your facebook account.